2" 4" 6" LED Sapphire Substrate , Colorless Optical Window Glass

Brand Name:Silian
Certification:SGS/ ISO
Model Number:Customized
Minimum Order Quantity:500pcs
Delivery Time:5-8 weeks
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Location: Chongqing Chongqing China
Address: No.99 Tong Xi Road, Caijia Town, Beibei District, Chongqing,China
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Product Details

Sapphire substrate for blue and green LED components


Product Description


The materials used in blue and green light-emitting diodes are mainly GaN. Early GaN research has not made significant progress, mainly because it has been unable to find a substrate that matches the lattice constant of GaN, resulting in the density of defects in the epitaxial crystal. Too high, until 1991, Nichia Co. researcher S. Nakamura used low-temperature growth of an amorphous buffer layer of GaN on a c-axis sapphire substrate, and then grown it at high temperature to obtain the same mirror-like surface. For GaN, the problem of the epitaxial part has obtained a major breakthrough at this time.


At present, GaN components of high-brightness blue-green high-light-emitting diodes are mainly grown on Sapphire Wafer, the maximum size can reach 6 inches, and can provide different axial requirements including c, m, a, and r. In addition, to meet customer needs, other next-generation substrates have also been developed.


Technical Specification


Sapphire(Al2O3) Wafer

TypeOrientationThickness(mm)Diameter+Z / -Z
Single Side Polishedc/a/m/r0.43/0.5/0.652”/4”/6”Polished/Ground
Double Side Polishedc/a/m/r0.43/0.5/0.652”/4”/6”Polished/Polished

Sapphire flat sheet specifications

 2"4"6"
ItemTargetToleranceUnitTargetToleranceUnitTargetToleranceUnit
Diameter :50.8±0.1mm100±0.1mm150±0.2mm
Thickness :430±15um650±15um1300±25um
Flat Length:16±1mm30±1mm47.5±1mm
C-plane (0001) Off-set Angle (M-axis):0.2±0.1degree0.2±0.1degree0.2±0.1degree
Flat Off-set Angle:0±0.25degree0±0.3degree0±0.3degree
Bow:-10~0um-15~0um-15~15um
Warp:≤ 15um≤ 20um≤ 30um
TTV:≤ 10um≤ 10um≤ 25um
LTV(5mm*5mm):≤ 2um≤ 2um≤ 2um
Front side Roughness:≤ 2Å≤ 2Å≤ 2Å
Back side Roughness:0.6~1.2um0.6~1.2um0.6~1.4um

Product advantages


Pattern Sapphire Substrate (PSS): The sapphire substrate is designed to produce nano-scale specific regular microstructure patterns by growth or etching to control the output light form of the LED. At the same time, it can reduce the defects of the GaN grown on the sapphire substrate, improve the quality of the epitaxy, and improve the internal quantum efficiency of the LED and increase the light extraction efficiency.

It has the characteristics of high sound velocity, high temperature resistance, corrosion resistance, high hardness, high light transmittance, high melting point (2045°C), etc.



China 2 4 6 LED Sapphire Substrate , Colorless Optical Window Glass supplier

2" 4" 6" LED Sapphire Substrate , Colorless Optical Window Glass

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